P0578 MAZDA Cruise Control Multi Function Input A Circuit Stuck

Possible causes

– Faulty Cruise Control Function Switch
– Cruise Control Function Switch harness is open or shorted
– Cruise Control Function Switch circuit poor electrical connection

When is the obd code mean?

The P0578 codes is set when the multi-function input A circuit is stuck.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)
– Cruise control system inoperative